This is not a proper subject for a "dev" list, but I've queried every other
reasonable resource, with no result.
I have a small app using CXF, JAX-RS, JAXB, along with two JAXB extensions,
and Maven.
I use the "cxf-xjc-plugin" in Maven, along with the "Element Wrapper" and
"Fluent API" JAXB extensions, to generate a set of Java classes from a set
of schemas. This works fine.
I'm attempting to convert this build from Maven to Gradle. The key part is
XJC and these JAXB extensions. Ever single way I've tried to run XJC fails
with the following exception (the referenced classname varies depending on
whether I leave in both JAXB extensions or remove one from my classpath):
Caused by: java.util.ServiceConfigurationError: com.sun.tools.xjc.Plugin:
Provider com.sun.tools.xjc.addon.xew.XmlElementWrapperPlugin not a subtype
at com.sun.tools.xjc.Options.findServices(Options.java:957)
at com.sun.tools.xjc.Options.getAllPlugins(Options.java:374)
at com.sun.tools.xjc.Options.parseArgument(Options.java:688)
at com.sun.tools.xjc.Options.parseArguments(Options.java:809)
at com.sun.tools.xjc.XJC2Task._doXJC(XJC2Task.java:474)
at com.sun.tools.xjc.XJC2Task.doXJC(XJC2Task.java:457)
at com.sun.tools.xjc.XJC2Task.execute(XJC2Task.java:380)
at com.sun.istack.tools.ProtectedTask.execute(ProtectedTask.java:103)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
I've tried using the Ant XJC task from Gradle. I've tried it from an Ant
"build.xml". I tried a Bash script directly calling the XJCFacade class.
They all get the same result. I have the 2.2.7 version of the xjc, impl,
and api jaxb jars in my classpath, along with the extension jars and other
dependencies of those jars.
I've posted about this on jaxb-user, ant-user, cxf-user (to ask why they
think this only works with the cxf maven plugin), stackoverflow, and the
issues page for the ElementWrapper plugin. The only response of any
substance I got was indirectly from Martin Gainty, from my ant-user
posting, where he talked a bit about how the "ServiceLoader" framework
works. He didn't really provide a solution, but he implied that "Maven
solves the issue by inheriting System CL at CLI before tacking on
maven-core and any consequent plugins". I've tried some classpath ordering
changes along those lines, but that doesn't help.
Any useful information or leads would be appreciated.